Has anyone had any success controlling POA TRIV using Tenacity? Please share any information, ie rates, additional herbicides-such as turflon ester, and timing. Thanks.
Tenacity and POA Triv (rough stalk bluegrass)
RRHAMMONS
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I have seen one study where control was listed as only 30%. Another just says it is "damaging" to PT. I would like to see what kind of effect the same protocols used for poa annua has on Poa trivialis, ie. multiple low dose, short interval fall applications. PT does turn white but seems to outgrow the effect easily.
I think I will try 5oz/acre, 2-3 apps three weeks apart starting in May on PT. Do you know which university did the trials?
Take a look at some data from UNL
http://turf.unl.edu/extpresentationspdf/Expopoaannuatrivupdate.pdf
http://turf.unl.edu/extpresentationspdf/Expopoaannuatrivupdate.pdf
I sprayed my POA Triv one week ago today. PT is starting to show signs of bleaching in the middle of the the stem and growth has slowed down substantially. The PT has changed about 2-3 shades lighter green than it was previously. I can easily identify all of the patches of PT now. Also, showing whitning on most all of the other wild grasses such as goosegrass and Poa Annua. No whitening on fescue so far. I was supprised at all of the other grasses it is working on in my lawn. I thought my lawn was mostly fescue beside the PT. I guess the whitening really gives you perspective on the amount of other grassy weeds that are lurking in your lawn! Anyone else seeing any results.:clapping:
Amy Fouty, CSFM, Michigan State
We have battled for many years, like most in our spring and fall with the cloudy, damp climate here in Mid Michigan. I have worked with our turf department here on campus for many years, Dr. Calhoun, our weeds specialist, and his research technician, Aaron Hathway, for viable options to rid us of Poa annua and Poa Trivialis. Until this season I had been weary of the “latest and greatest” products for Poa control. I am a very conservative grass grower and have been skeptical of many products. We first conducted a trial with Velocity and Tenacity at different rates and intervals of applications in the south end zone of Spartan Stadium. We determined from these trials in the spring we could use fewer products with repeated applications.
We made our applications to Spartan stadium field in mid-June, which consisted of taking 1oz/acre rates and making five applications, one application every 3-4 days, to equal one 5oz/acre total. The repeated applications at the low labeled rate provided us with an excellent reduction of Poa annua, Poa trivialis, and Common Bermuda (on the practice football test area). Throughout the 14-day application process we seeded Kentucky bluegrass, aerated, and topdressed the playing surface. As both PoaÂ’s browned out in weeks 3-4, we had numerous seedlings surfacing and thriving and by week 6 you could not tell we had done anything.
We reduced our “weedy grasses” significantly but not completely with these applications. The existing Kentucky bluegrass remained healthy with no reduction in root density or rhizome growth. In areas we had solid Poa annua it has been reduced by at least 50% and now has Kentucky bluegrass thriving within those areas. I believe with repeated treatments this is a great tool in the tool box to combat Poa annua and maintain safe and consistent playing conditions.
Using Tenacity positively benefited all of our fields. It is our hope that we were able to show another tool to help achieve a uniform and safe playing surface for the athletes that use our facilities. As you can see we all used Tenacity at different times of the growing season with slightly different application rates and timing. We all had great success. Please donÂ’t hesitate to contact any of us on more details using Tenacity.
We have battled for many years, like most in our spring and fall with the cloudy, damp climate here in Mid Michigan. I have worked with our turf department here on campus for many years, Dr. Calhoun, our weeds specialist, and his research technician, Aaron Hathway, for viable options to rid us of Poa annua and Poa Trivialis. Until this season I had been weary of the “latest and greatest” products for Poa control. I am a very conservative grass grower and have been skeptical of many products. We first conducted a trial with Velocity and Tenacity at different rates and intervals of applications in the south end zone of Spartan Stadium. We determined from these trials in the spring we could use fewer products with repeated applications.
We made our applications to Spartan stadium field in mid-June, which consisted of taking 1oz/acre rates and making five applications, one application every 3-4 days, to equal one 5oz/acre total. The repeated applications at the low labeled rate provided us with an excellent reduction of Poa annua, Poa trivialis, and Common Bermuda (on the practice football test area). Throughout the 14-day application process we seeded Kentucky bluegrass, aerated, and topdressed the playing surface. As both PoaÂ’s browned out in weeks 3-4, we had numerous seedlings surfacing and thriving and by week 6 you could not tell we had done anything.
We reduced our “weedy grasses” significantly but not completely with these applications. The existing Kentucky bluegrass remained healthy with no reduction in root density or rhizome growth. In areas we had solid Poa annua it has been reduced by at least 50% and now has Kentucky bluegrass thriving within those areas. I believe with repeated treatments this is a great tool in the tool box to combat Poa annua and maintain safe and consistent playing conditions.
Using Tenacity positively benefited all of our fields. It is our hope that we were able to show another tool to help achieve a uniform and safe playing surface for the athletes that use our facilities. As you can see we all used Tenacity at different times of the growing season with slightly different application rates and timing. We all had great success. Please donÂ’t hesitate to contact any of us on more details using Tenacity.
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What are you guys paying for the 8 oz bottles ?
$50 at EH Griffith
4 dat and seeing browning from crown out. Quick visual from street or further than 8' will not show signs. From closer inspection, definitive damage to select weed species is evident. Slight damage to younger fescue and fine leaf fescues. Not sure of recovery on these yet. Very pleased with results so far. It will be interesting to see different weed species handled and under what conditions during the summer.
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Well... I found out WHERE my poa Aand poa T came from
John deere landscapes, park and athletic blend.
I overseeded 3 lawns with it all different locations all 3 lawns are loaded. i still have some of the seed left. Now what to do ? Call JDL Corporate? Do they hold any responsibility? does the weed seed % ( even though it dont say poa ) cover them ? I find it a hell of a thing that the mgr of my JDL location tells me i have to kill it all with roundup and start over because of a product they sold me What do you guys think ?
John deere landscapes, park and athletic blend.
I overseeded 3 lawns with it all different locations all 3 lawns are loaded. i still have some of the seed left. Now what to do ? Call JDL Corporate? Do they hold any responsibility? does the weed seed % ( even though it dont say poa ) cover them ? I find it a hell of a thing that the mgr of my JDL location tells me i have to kill it all with roundup and start over because of a product they sold me What do you guys think ?
UNL and the University of Illinois did some good research and they found that Tenacity applied at .05 pounds of ai, three times a week for 10 weeks provided nearly 98% control of Poa annua. This is obviously not an option for the majority of residential lawns for the sheer amount of applications but as long as you follow the label for total amount of ai applied...it's something to consider.
Now that I think about, I orginally never had any PT in my lawn (4 years old) which was sewn in Falcon II Fescue until I overseeded with Lesco Trigold seed. The year following the overseed is when I finally figure out that I had PT. I at first though my problem was brown patch and it was brown patch in the PT. But before I knew it was brown patch, I used a fungicide which only helped the PT survive the disease and the next year it was double the previously year. I am in hopes to reduce the PT and keep at bay with tenacity. We will see how it goes, three rounds two weeks apart at 5 oz/A.
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I to got a bumper crop of poa after over seeding with a lesco seed.
I'm going to try and spot treat it with tenacity.There are a bunch of spots so I'll be busy.
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There are a bunch of spots so I'll be busy.[/QUOTE said:
Update. One week since second application, PT is starting to turn brown instead of just white from the tenacity. It appears to be killing the PT ! One more app to go next weekend and I will start posting the results and some pics.
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Brown from ? what did you apply ?
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